linux-kernel - Re: 3.19 on Nokia n900: audio quality awful

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Date:	Tue, 6 Jan 2015 17:04:15 -0600
From:	Felipe Balbi <balbi@...com>
To:	Pavel Machek <pavel@....cz>
CC:	Felipe Balbi <balbi@...com>, Aaro Koskinen <aaro.koskinen@....fi>,
	<pali.rohar@...il.com>, <sre@...ian.org>, <sre@...g0.de>,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <tony@...mide.com>,
	<khilman@...nel.org>, <ivo.g.dimitrov.75@...il.com>
Subject: Re: 3.19 on Nokia n900: audio quality awful

Hi,

On Tue, Jan 06, 2015 at 11:56:14PM +0100, Pavel Machek wrote:
> > > But I'm mounting it from userspace (using builtin initramfs inside
> > > zImage), with a poll loop that waits for a device to appear. Maybe if you
> > > do it from kernel you need to use root wait/delay etc. options?
> > 
> > yeah, rootwait should do it.
> 
> No, rootwait does not solve it. Try it. Tested many times. (And yes,
> you need to actually fool the rear cover sensor or close the phone.)

yeah, just put a magnet or, if you have spare back covers, cut one so
that you "close" it, but still allow you to put the thing on a
development jig.

Also, if why doesn't rootwait work ? You never have a new mmc node or is
the mmc node changing names ?

-- 
balbi

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